France has started a war with Austria. They didn't want Austria to make King Louis XVI king again. The war had various effects on France. They were in poverty and had food shortages. At the end France pulled the victory from Austria at Valmy.
King Louis XVI and his Queen were sentenced to death for quality of treason. They were executed with the guillotine in place for the Revolution in Paris.
Maximilien was able to gain control became the leader of the Committee of Public Safety. For a year he governed almost like a dictator and that time was known as the Reign of Terror. Maximilien would end up being beheaded marking the end of the Reign of Terror.